function downurl(path) { 

var client = new OSS({ region: '地區', accessKeyId: 'accessKeyId', accessKeySecret: 'accessKeySecret', bucket: '域名' }); 

var url = client.signatureUrl(path); downloadFile(url); 

}

function downloadFile(url) { 

 try{ var elemIF = document.createElement("iframe");

 elemIF.src = url; 

 elemIF.style.display = "none"; document.body.appendChild(elemIF); 

 }catch(e)

{ } 

 }